attribute vec4 a_position;
attribute vec4 a_color;
attribute vec2 a_texCoord0;

uniform mat4 u_projTrans;
 
varying vec4 vColor;
varying vec2 vTexCoord;

void main() {
       vColor = a_color;
       vTexCoord = a_texCoord0;
       gl_Position =  u_projTrans * a_position;
}